Where did my sweet Olivia go?

So lately Olivia has been laughing like a crazy, creepy person. I don't know where she picked it up but it's scary and funny all at the same time. The other day at dinner it was all she doing...of course it cracked my and the others up which only egged her on more. It was a vicious cycle I tell you! I was laughing so hard I was crying. Here is video of her from last night...she wasn't doing it as long but you get the picture! 

Enjoy!